Just inspected my hives and have noticed lately a very sour sock smell from all them. I did not see signs of AFB or EFB, but did notice we have a very nice fall nectar flow in progress, with lots of golden rod and asters - I know both plants can smell sour, could this be the source of the odor??? Having lost two hives in the past to AFB, I do know what the signs are, and remember that odor to be a bit more foul. Come to think of it, every fall at this time the hives smell. Maybe I answered my own question, but would like some conformation.